Bird cage



FIG. 1 is a top perspective view of a bird cage showing my new design;

FIG. 2 is a top perspective view of the inner portion thereof;

FIG. 3 is a top perspective view of the outer portion thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is another top plan view thereof showing the cage in an open position; and

FIG. 7 is a top perspective view of a modified form of the bird cage shown in FIG. 1.

The removable wire mesh top cover has been omitted from FIGS. 2 and 3 for ease of illustration. 

The ornamental design for a bird cage, as shown and described. 